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Have 03 C4S 55K mi. Both Cats going bad. getting CEL after every 50 to 75 mi. First from bank 1 and now bank 2. Have basic Torque App software to reset. Pain in Butt. I track car about 3 times a year. No car mods. Run for fun. Looking to boost HP via new performance exhaust system. Thinking Headers and Sport CATs from Fabspeed. Factory mufflers are original, seem fine and would like to reuse. Along with perhaps new clamps, gaskets and a few new bolts, does anyone have advise on this?
O3C4S replied to O3C4S's topic in 996 Series (Carrera, Carrera 4, Carrera 4S, Targa)Sorry, Way late on this reply, I rebuilt calipers with new seals and dist caps. easy fix. Piston walls and pistons were in a-one shape. cleaned and reinstalled. Good improvement, pads were relatively new so didn't change. Bleeding was simple with assist by wife on the pedal. Small quantities of bubbles when bled. I actually pre-filled calipers with fluid before installation to help minimize fluid waste and reduce air bubbles. Not sure what people think of that method but I'm anal sometimes, worked for me. Bled fronts only. Ran a weekend Road America after rebuild, worked great. Normal and even brake dust accumulation on both sides. Also had 4 wheel alignment to double check pulling. Specs were off a bit so this contributed to excellent tracking while momentary hands off steering wheel, no wandering. So I believe result was a combo of both fixes.
O3C4S replied to O3C4S's topic in 996 Series (Carrera, Carrera 4, Carrera 4S, Targa)only does while braking. brake dust on right side is slightly more than left possibly indicating problem. was going to try to bleed system. can these pistons be rebuilt or reworked or? not sure. don't want to replace if repairable.
2003 911 C4S, Intermittent brake pull to right. Brake fluid replaced. Replaced all pads, no change. Car has 55,000. Where do I go next? Sticky caliper maybe? Brake booster? Any suggestions welcomed.